How popular is Jaryn?

Jaryn is an uncommonly occurring given name for men. Jaryn is also an uncommon last name for both adults and children. (2000 U.S. Census)

Which version is better?

with its source form and related boy names. Popular varying forms of Jaryn (outside Top 2000) are Jaron(#1523 a year ago), Jerron, Jarron, Jarren, Jaren and Jarin. Other variants, like Jeran, are seldom used. These forms of Jaryn reached the height of their popularity 14 years ago (usage of 0.05%) and are now significantly less popular (usage 0.01%, ▼89.8%), with forms like Jaron going out of style. (Top Baby Names, 2015)